Timeline considerations for intra-UE multiplexing

ABSTRACT

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a grant scheduling a first higher priority channel that has a higher priority than each channel of multiple lower priority channels scheduled for the UE. The UE may drop a first lower priority channel of the multiple lower priority channels that at least partially overlaps in time with the first higher priority channel based on determining that the grant is received prior to a multiplexing deadline for the multiple lower priority channels. The UE may then transmit or receive a first transmission using the first higher priority channel and a second transmission using a second lower priority channel of the multiple lower priority channels based on the dropping.

CROSS REFERENCE

The present application for Patent is a Continuation of U.S. patentapplication Ser. No. 16/838,582 by HOSSEINI et al., entitled “TIMELINECONSIDERATIONS FOR INTRA-UE MULTIPLEXING” filed Apr. 2, 2020, whichclaims the benefit of U.S. Provisional Patent Application No. 62/830,343by HOSSEINI et al., entitled “TIMELINE CONSIDERATIONS FOR INTRA-UEMULTIPLEXING,” filed Apr. 5, 2019, and the benefit of U.S. ProvisionalPatent Application No. 62/830,537 by HOSSEINI et al., entitled “TIMELINECONSIDERATIONS FOR INTRA-UE MULTIPLEXING,” filed Apr. 7, 2019, each ofwhich is assigned to the assignee hereof, and each of which is expresslyincorporated by reference herein.

BACKGROUND

The following relates generally to wireless communications, and morespecifically to timeline considerations for intra-UE multiplexing.

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform spread orthogonal frequency division multiplexing(DFT-S-OFDM). A wireless multiple-access communications system mayinclude a number of base stations or network access nodes, eachsimultaneously supporting communication for multiple communicationdevices, which may be otherwise known as user equipment (UE).

A UE may communicate on multiple wireless channels using different typesof wireless communications. In some cases, communications on two or morewireless channels may be scheduled simultaneously, resulting in acollision. Conventional techniques for resolving collisions on wirelesschannels can be improved.

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support timeline considerations for intra-UEmultiplexing. Generally, the described techniques provide for supportingcommunications of different priorities. In some cases, communicationsbetween a user equipment (UE) and a base station may have an associatedpriority level. In some cases, the UE may be scheduled for simultaneoustransmission on two or more uplink channels, but the UE may not becapable of the simultaneous transmission. The UE may instead multiplexthe colliding uplink channels if they have the same priority. If thecolliding channels have different priorities, the UE may drop the lowerpriority channel in whole or in part and transmit the higher prioritychannel instead.

In some cases, the UE may be scheduled for at least two low prioritychannels that collide in time with at least one high priority channel.The UE may support multiplexing the at least two low priority channels,but the UE may also support dropping any low priority channel whichoverlaps with a high priority channel. Therefore, the UE may eithermultiplex the colliding low priority uplink channels then drop thefinal, multiplexed low priority channel, or the UE may drop the lowpriority uplink channels that collide with the high priority uplinkchannel then multiplex any remaining low priority uplink channels thatcollide. Techniques described herein may enable a UE to determine anorder for dropping and multiplexing colliding low latency channels whenat least one of the colliding low latency channels also collides with ahigh priority uplink channel.

In some cases, the UE may determine whether to first drop or multiplexthe low priority uplink channels based on when the UE receives a grantfor the high priority uplink channel. The UE may determine whether tomultiplex or drop first based on if the high priority grant is receivedbefore or after a multiplexing timeline deadline. For example, if thehigh priority grant is received after the deadline, the UE may multiplexthe low priority uplink channels first, then drop the multiplexed lowpriority channel if it collides with the high priority uplink channel.If the UE receives the high priority grant at a time before themultiplexing timeline deadline, then the UE may drop some the lowpriority uplink channel(s) that collide with the high priority uplinkchannel prior to multiplexing. Other schemes for determining whether tomultiplex first or drop first are described herein.

A method of wireless communications by a UE is described. The method mayinclude receiving a grant scheduling a first higher priority channelthat has a higher priority than each channel of a set of lower prioritychannels scheduled for the UE, dropping a first lower priority channelof the set of lower priority channels that at least partially overlapsin time with the first higher priority channel based on determining thatthe grant is received prior to a multiplexing deadline for the set oflower priority channels, and transmitting or receiving a firsttransmission using the first higher priority channel and a secondtransmission using a second lower priority channel of the set of lowerpriority channels based on the dropping.

An apparatus for wireless communications by a UE is described. Theapparatus may include a processor, memory in electronic communicationwith the processor, and instructions stored in the memory. Theinstructions may be executable by the processor to cause the apparatusto receive a grant scheduling a first higher priority channel that has ahigher priority than each channel of a set of lower priority channelsscheduled for the UE, drop a first lower priority channel of the set oflower priority channels that at least partially overlaps in time withthe first higher priority channel based on determining that the grant isreceived prior to a multiplexing deadline for the set of lower prioritychannels, and transmit or receiving a first transmission using the firsthigher priority channel and a second transmission using a second lowerpriority channel of the set of lower priority channels based on thedropping.

Another apparatus for wireless communications by a UE is described. Theapparatus may include means for receiving a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for the UE, dropping a firstlower priority channel of the set of lower priority channels that atleast partially overlaps in time with the first higher priority channelbased on determining that the grant is received prior to a multiplexingdeadline for the set of lower priority channels, and transmitting orreceiving a first transmission using the first higher priority channeland a second transmission using a second lower priority channel of theset of lower priority channels based on the dropping.

A non-transitory computer-readable medium storing code for wirelesscommunications by a UE is described. The code may include instructionsexecutable by a processor to receive a grant scheduling a first higherpriority channel that has a higher priority than each channel of a setof lower priority channels scheduled for the UE, drop a first lowerpriority channel of the set of lower priority channels that at leastpartially overlaps in time with the first higher priority channel basedon determining that the grant is received prior to a multiplexingdeadline for the set of lower priority channels, and transmit orreceiving a first transmission using the first higher priority channeland a second transmission using a second lower priority channel of theset of lower priority channels based on the dropping.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining themultiplexing deadline relative to a beginning of the first lowerpriority channel of the set of lower priority channels.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining themultiplexing deadline based on whether the grant schedules the firsthigher priority channel for uplink transmission or downlinktransmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining themultiplexing deadline based on one or more processing timelines of theset of lower priority channels, one or more subcarrier spacings of theset of lower priority channels, a timing capability of the UE, or anycombination thereof.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for multiplexing, based onthe dropping, content of a remaining subset of the set of lower prioritychannels that at least partially overlap in time with one another, wherethe second transmission includes the multiplexed content.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting orreceiving a third transmission using a third lower priority channel ofthe set of lower priority channels that does not overlap with any otherlower priority channel of the set of lower priority channels, where thethird transmission includes non-multiplexed content.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for dropping the firstlower priority channel based on determining that the grant is receivedat least a threshold number of symbol periods prior to the multiplexingdeadline.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the threshold number ofsymbol periods is based on a transmission direction associated with thegrant.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for dropping a second lowerpriority channel of the set of lower priority channels that at leastpartially overlaps in time with the first higher priority channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining that the grantmay be received prior to the multiplexing deadline may includeoperations, features, means, or instructions for determining that acontrol channel carrying the grant ends prior to the multiplexingdeadline.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining that the grantmay be received prior to the multiplexing deadline may includeoperations, features, means, or instructions for determining that ashared data channel carrying the grant ends prior to the multiplexingdeadline.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, transmitting or receiving thefirst transmission and the second transmission may include operations,features, means, or instructions for transmitting or receiving each ofthe first transmission and the second transmission using a singlecomponent carrier.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining that thefirst lower priority channel at least partially overlaps in time withthe first higher priority channel based on setting a timing advance to acommon value for a first component carrier configured for the firstlower priority channel and a second component carrier configured for thefirst higher priority channel, the first component carrier differingfrom the second component carrier.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a prioritylevel of the first higher priority channel based on an indicationincluded in the grant.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the indication may be one ormore of a format of scheduling downlink control information includingthe grant, a bit field, a radio network temporary identifier, a controlresource set index, an order in which the first higher priority channelmay be scheduled relative to each channel of the set of lower prioritychannels, or a transmission configuration indicator state correspondingto the grant.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a set ofgrants that respectively schedule the set of lower priority channels.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel may be a first control channel and the first lower prioritychannel may be a second control channel or a shared data channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, each of the set of lowerpriority channels may have a same priority level.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel may be a control channel or a shared data channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel and the second lower priority channel do not overlap in time.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel transports an ultra-reliable low latency service and the secondlower priority channel transports an enhanced mobile broadband service.

A method of wireless communications by a base station is described. Themethod may include transmitting a grant scheduling a first higherpriority channel that has a higher priority than each channel of a setof lower priority channels scheduled for a UE, dropping a first lowerpriority channel of the set of lower priority channels that at leastpartially overlaps in time with the first higher priority channel basedon the grant being transmitted prior to a multiplexing deadline for theset of lower priority channels, and transmitting or receiving a firsttransmission using the first higher priority channel and a secondtransmission using a second lower priority channel of the set of lowerpriority channels based on the dropping.

An apparatus for wireless communications by a base station is described.The apparatus may include a processor, memory in electroniccommunication with the processor, and instructions stored in the memory.The instructions may be executable by the processor to cause theapparatus to transmit a grant scheduling a first higher priority channelthat has a higher priority than each channel of a set of lower prioritychannels scheduled for a UE, drop a first lower priority channel of theset of lower priority channels that at least partially overlaps in timewith the first higher priority channel based on the grant beingtransmitted prior to a multiplexing deadline for the set of lowerpriority channels, and transmit or receiving a first transmission usingthe first higher priority channel and a second transmission using asecond lower priority channel of the set of lower priority channelsbased on the dropping.

Another apparatus for wireless communications by a base station isdescribed. The apparatus may include means for transmitting a grantscheduling a first higher priority channel that has a higher prioritythan each channel of a set of lower priority channels scheduled for aUE, dropping a first lower priority channel of the set of lower prioritychannels that at least partially overlaps in time with the first higherpriority channel based on the grant being transmitted prior to amultiplexing deadline for the set of lower priority channels, andtransmitting or receiving a first transmission using the first higherpriority channel and a second transmission using a second lower prioritychannel of the set of lower priority channels based on the dropping.

A non-transitory computer-readable medium storing code for wirelesscommunications by a base station is described. The code may includeinstructions executable by a processor to transmit a grant scheduling afirst higher priority channel that has a higher priority than eachchannel of a set of lower priority channels scheduled for a UE, drop afirst lower priority channel of the set of lower priority channels thatat least partially overlaps in time with the first higher prioritychannel based on the grant being transmitted prior to a multiplexingdeadline for the set of lower priority channels, and transmit orreceiving a first transmission using the first higher priority channeland a second transmission using a second lower priority channel of theset of lower priority channels based on the dropping.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining themultiplexing deadline relative to a beginning of the first lowerpriority channel of the set of lower priority channels.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining themultiplexing deadline based on whether the grant schedules the firsthigher priority channel for uplink transmission or downlinktransmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining themultiplexing deadline based on one or more processing timelines of theset of lower priority channels, one or more subcarrier spacings of theset of lower priority channels, a timing capability of the UE, or anycombination thereof.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for multiplexing, based onthe dropping, content of a remaining subset of the set of lower prioritychannels that at least partially overlap in time with one another, wherethe second transmission includes the multiplexed content.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting orreceiving a third transmission using a third lower priority channel ofthe set of lower priority channels that does not overlap with any otherlower priority channel of the set of lower priority channels, where thethird transmission includes non-multiplexed content.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for dropping the firstlower priority channel based on the grant being transmitted at least athreshold number of symbol periods prior to the multiplexing deadline.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the threshold number ofsymbol periods is based on a transmission direction associated with thegrant.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for dropping a second lowerpriority channel of the set of lower priority channels that at leastpartially overlaps in time with the first higher priority channel.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining that acontrol channel carrying the grant ends prior to the multiplexingdeadline.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining that ashared data channel carrying the grant ends prior to the multiplexingdeadline.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, transmitting or receiving thefirst transmission and the second transmission may include operations,features, means, or instructions for transmitting or receiving each ofthe first transmission and the second transmission using a singlecomponent carrier.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining that thefirst lower priority channel at least partially overlaps in time withthe first higher priority channel based on setting a timing advance to acommon value for a first component carrier configured for the firstlower priority channel and a second component carrier configured for thefirst higher priority channel, the first component carrier differingfrom the second component carrier.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining a prioritylevel of the first higher priority channel based on an indicationincluded in the grant.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the indication may be one ormore of a format of scheduling downlink control information includingthe grant, a bit field, a radio network temporary identifier, a controlresource set index, an order in which the first higher priority channelmay be scheduled relative to each channel of the set of lower prioritychannels, or a transmission configuration indicator state correspondingto the grant.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a set ofgrants that respectively schedule the set of lower priority channels.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel may be a first control channel and the first lower prioritychannel may be a second control channel or a shared data channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, each of the set of lowerpriority channels may have a same priority level.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel may be a control channel or a shared data channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel and the second lower priority channel do not overlap in time.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first higher prioritychannel transports an ultra-reliable low latency service and the secondlower priority channel transports an enhanced mobile broadband service.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a system for wireless communications inaccordance with aspects of the present disclosure.

FIG. 2 illustrates an example of a wireless communications scheme inaccordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a collision resolution scheme inaccordance with aspects of the present disclosure.

FIG. 4 illustrates an example of a process flow in accordance withaspects of the present disclosure.

FIGS. 5 and 6 show block diagrams of devices in accordance with aspectsof the present disclosure.

FIG. 7 shows a block diagram of a communications manager in accordancewith aspects of the present disclosure.

FIG. 8 shows a diagram of a system including a device in accordance withaspects of the present disclosure.

FIGS. 9 and 10 show block diagrams of devices in accordance with aspectsof the present disclosure.

FIG. 11 shows a block diagram of a communications manager in accordancewith aspects of the present disclosure.

FIG. 12 shows a diagram of a system including a device in accordancewith aspects of the present disclosure.

FIGS. 13 through 16 show flowcharts illustrating methods in accordancewith aspects of the present disclosure.

DETAILED DESCRIPTION

In some cases, communications between a user equipment (UE) and a basestation may have an associated priority level. For example, the UE maycommunicate on a first wireless channel using low priority signaling andcommunicate on a second wireless channel using high priority signaling.The priority of a wireless channel may be based on a variety of factors,such as a type of communication used on the channel, a format ofdownlink control information (DCI) scheduling the channel, a bit fieldin the DCI, a Radio Network Temporary Identifier (RNTI), a controlresource set index, a scheduling time of transmission (e.g., alater-granted channel may have higher priority), and a transmissionconfiguration indicator (TCI) state of the channel. Some example of thetypes of communications may include, for example, enhanced mobilebroadband (eMBB) and ultra-reliable low latency communications (URLLC).

In some cases, the UE may be scheduled for simultaneous transmission ontwo or more channels. However, the UE may not be capable of simultaneoustransmission for certain combinations of channels, as the uplinktransmissions may collide and not be decodable at the receiving device.If the UE is scheduled to transmit on two or more uplink channels suchthat there would be a collision, the UE may implement techniques toprevent the collision instead based on a priority of the collidingchannels. For example, if the colliding channels are of a same priority,the UE may multiplex the colliding channels. In some cases, the UE maymultiplex colliding transmissions of the same priority if a jointtransmission timeline is satisfied. If the colliding channels havedifferent priorities, the UE may drop the lower priority channel andtransmit the higher priority channel instead.

In some cases, the UE may be scheduled for at least two colliding lowpriority channels and at least one colliding high priority channel. TheUE may support multiplexing the at least two low priority channels, butthe UE may also support dropping any low priority channel which overlapswith a high priority channel. Therefore, the UE may either multiplex thecolliding low priority uplink channels then drop the final, multiplexedlow priority transmission, or the UE may drop the low priority uplinkchannels that collide with the high priority uplink channel thenmultiplex any remaining, colliding low priority uplink channels.Techniques described herein may enable a UE to determine an order fordropping and multiplexing colliding low latency channels when at leastone of the colliding low latency channels also collides with a highpriority uplink channel.

In some cases, the UE may determine whether to first drop or multiplexthe low priority uplink channels based on when the UE receives a grantfor the high priority uplink channel. The UE may determine whether tomultiplex or drop first based on if the high priority grant is receivedbefore or after a multiplexing timeline deadline. For example, if thehigh priority grant is received after the deadline, the UE may multiplexthe low priority uplink channels first, then drop the multiplexed lowpriority channel if it collides with the high priority uplink channel.If the UE receives the high priority grant at a time before themultiplexing timeline deadline, then the UE may drop some of the lowpriority uplink channel(s) that collide with the high priority uplinkchannel prior to multiplexing. Other schemes for determining whether tomultiplex first or drop first are described herein.

Aspects of the disclosure are initially described in the context of awireless communications system. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to timeline considerationsfor intra-UE multiplexing.

FIG. 1 illustrates an example of a wireless communications system 100 inaccordance with aspects of the present disclosure. The wirelesscommunications system 100 includes base stations 105, UEs 115, and acore network 130. In some examples, the wireless communications system100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A)network, an LTE-A Pro network, or a New Radio (NR) network. In somecases, wireless communications system 100 may support enhanced broadbandcommunications, ultra-reliable (e.g., mission critical) communications,low latency communications, or communications with low-cost andlow-complexity devices.

Base stations 105 may wirelessly communicate with UEs 115 via one ormore base station antennas. Base stations 105 described herein mayinclude or may be referred to by those skilled in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB orgiga-NodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or some other suitable terminology. Wirelesscommunications system 100 may include base stations 105 of differenttypes (e.g., macro or small cell base stations). The UEs 115 describedherein may be able to communicate with various types of base stations105 and network equipment including macro eNBs, small cell eNBs, gNBs,relay base stations, and the like.

Each base station 105 may be associated with a particular geographiccoverage area 110 in which communications with various UEs 115 issupported. Each base station 105 may provide communication coverage fora respective geographic coverage area 110 via communication links 125,and communication links 125 between a base station 105 and a UE 115 mayutilize one or more carriers. Communication links 125 shown in wirelesscommunications system 100 may include uplink transmissions from a UE 115to a base station 105, or downlink transmissions from a base station 105to a UE 115. Downlink transmissions may also be called forward linktransmissions while uplink transmissions may also be called reverse linktransmissions.

The geographic coverage area 110 for a base station 105 may be dividedinto sectors making up a portion of the geographic coverage area 110,and each sector may be associated with a cell. For example, each basestation 105 may provide communication coverage for a macro cell, a smallcell, a hot spot, or other types of cells, or various combinationsthereof. In some examples, a base station 105 may be movable andtherefore provide communication coverage for a moving geographiccoverage area 110. In some examples, different geographic coverage areas110 associated with different technologies may overlap, and overlappinggeographic coverage areas 110 associated with different technologies maybe supported by the same base station 105 or by different base stations105. The wireless communications system 100 may include, for example, aheterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different typesof base stations 105 provide coverage for various geographic coverageareas 110.

The term “cell” refers to a logical communication entity used forcommunication with a base station 105 (e.g., over a carrier), and may beassociated with an identifier for distinguishing neighboring cells(e.g., a physical cell identifier (PCID), a virtual cell identifier(VCID)) operating via the same or a different carrier. In some examples,a carrier may support multiple cells, and different cells may beconfigured according to different protocol types (e.g., machine-typecommunication (MTC), narrowband Internet-of-Things (NB-IoT), enhancedmobile broadband (eMBB), or others) that may provide access fordifferent types of devices. In some cases, the term “cell” may refer toa portion of a geographic coverage area 110 (e.g., a sector) over whichthe logical entity operates.

UEs 115 may be dispersed throughout the wireless communications system100, and each UE 115 may be stationary or mobile. A UE 115 may also bereferred to as a mobile device, a wireless device, a remote device, ahandheld device, or a subscriber device, or some other suitableterminology, where the “device” may also be referred to as a unit, astation, a terminal, or a client. A UE 115 may also be a personalelectronic device such as a cellular phone, a personal digital assistant(PDA), a tablet computer, a laptop computer, or a personal computer. Insome examples, a UE 115 may also refer to a wireless local loop (WLL)station, an Internet of Things (IoT) device, an Internet of Everything(IoE) device, or an MTC device, or the like, which may be implemented invarious articles such as appliances, vehicles, meters, or the like.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices, and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay that information to acentral server or application program that can make use of theinformation or present the information to humans interacting with theprogram or application. Some UEs 115 may be designed to collectinformation or enable automated behavior of machines. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples half-duplexcommunications may be performed at a reduced peak rate. Other powerconservation techniques for UEs 115 include entering a power saving“deep sleep” mode when not engaging in active communications, oroperating over a limited bandwidth (e.g., according to narrowbandcommunications). In some cases, UEs 115 may be designed to supportcritical functions (e.g., mission critical functions), and a wirelesscommunications system 100 may be configured to provide ultra-reliablecommunications for these functions.

In some cases, a UE 115 may also be able to communicate directly withother UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device(D2D) protocol). One or more of a group of UEs 115 utilizing D2Dcommunications may be within the geographic coverage area 110 of a basestation 105. Other UEs 115 in such a group may be outside the geographiccoverage area 110 of a base station 105, or be otherwise unable toreceive transmissions from a base station 105. In some cases, groups ofUEs 115 communicating via D2D communications may utilize a one-to-many(1:M) system in which each UE 115 transmits to every other UE 115 in thegroup. In some cases, a base station 105 facilitates the scheduling ofresources for D2D communications. In other cases, D2D communications arecarried out between UEs 115 without the involvement of a base station105.

Base stations 105 may communicate with the core network 130 and with oneanother. For example, base stations 105 may interface with the corenetwork 130 through backhaul links 132 (e.g., via an S1, N2, N3, orother interface). Base stations 105 may communicate with one anotherover backhaul links 134 (e.g., via an X2, Xn, or other interface) eitherdirectly (e.g., directly between base stations 105) or indirectly (e.g.,via core network 130).

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC), which may include at least one mobilitymanagement entity (MME), at least one serving gateway (S-GW), and atleast one Packet Data Network (PDN) gateway (P-GW). The MME may managenon-access stratum (e.g., control plane) functions such as mobility,authentication, and bearer management for UEs 115 served by basestations 105 associated with the EPC. User IP packets may be transferredthrough the S-GW, which itself may be connected to the P-GW. The P-GWmay provide IP address allocation as well as other functions. The P-GWmay be connected to the network operators IP services. The operators IPservices may include access to the Internet, Intranet(s), an IPMultimedia Subsystem (IMS), or a Packet-Switched (PS) Streaming Service.

At least some of the network devices, such as a base station 105, mayinclude subcomponents such as an access network entity, which may be anexample of an access node controller (ANC). Each access network entitymay communicate with UEs 115 through a number of other access networktransmission entities, which may be referred to as a radio head, a smartradio head, or a transmission/reception point (TRP). In someconfigurations, various functions of each access network entity or basestation 105 may be distributed across various network devices (e.g.,radio heads and access network controllers) or consolidated into asingle network device (e.g., a base station 105). In some cases,different TRPs may be associated with different types of traffic. Forexample, low priority channels for a first type of traffic may beassociated with a first TRP, and high priority channels for a secondtype of traffic may be associated with a second TRP.

Wireless communications system 100 may operate using one or morefrequency bands, typically in the range of 300 megahertz (MHz) to 300gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known asthe ultra-high frequency (UHF) region or decimeter band, since thewavelengths range from approximately one decimeter to one meter inlength. UHF waves may be blocked or redirected by buildings andenvironmental features. However, the waves may penetrate structuressufficiently for a macro cell to provide service to UEs 115 locatedindoors. Transmission of UHF waves may be associated with smallerantennas and shorter range (e.g., less than 100 km) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz.

Wireless communications system 100 may also operate in a super highfrequency (SHF) region using frequency bands from 3 GHz to 30 GHz, alsoknown as the centimeter band. The SHF region includes bands such as the5 GHz industrial, scientific, and medical (ISM) bands, which may be usedopportunistically by devices that may be capable of toleratinginterference from other users.

Wireless communications system 100 may also operate in an extremely highfrequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz),also known as the millimeter band. In some examples, wirelesscommunications system 100 may support millimeter wave (mmW)communications between UEs 115 and base stations 105, and EHF antennasof the respective devices may be even smaller and more closely spacedthan UHF antennas. In some cases, this may facilitate use of antennaarrays within a UE 115. However, the propagation of EHF transmissionsmay be subject to even greater atmospheric attenuation and shorter rangethan SHF or UHF transmissions. Techniques disclosed herein may beemployed across transmissions that use one or more different frequencyregions, and designated use of bands across these frequency regions maydiffer by country or regulating body.

In some cases, wireless communications system 100 may utilize bothlicensed and unlicensed radio frequency spectrum bands. For example,wireless communications system 100 may employ License Assisted Access(LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technologyin an unlicensed band such as the 5 GHz ISM band. When operating inunlicensed radio frequency spectrum bands, wireless devices such as basestations 105 and UEs 115 may employ listen-before-talk (LBT) proceduresto ensure a frequency channel is clear before transmitting data. In somecases, operations in unlicensed bands may be based on a carrieraggregation configuration in conjunction with component carriersoperating in a licensed band (e.g., LAA). Operations in unlicensedspectrum may include downlink transmissions, uplink transmissions,peer-to-peer transmissions, or a combination of these. Duplexing inunlicensed spectrum may be based on frequency division duplexing (FDD),time division duplexing (TDD), or a combination of both.

In some examples, base station 105 or UE 115 may be equipped withmultiple antennas, which may be used to employ techniques such astransmit diversity, receive diversity, multiple-input multiple-output(MIMO) communications, or beamforming. For example, wirelesscommunications system 100 may use a transmission scheme between atransmitting device (e.g., a base station 105) and a receiving device(e.g., a UE 115), where the transmitting device is equipped withmultiple antennas and the receiving device is equipped with one or moreantennas. MIMO communications may employ multipath signal propagation toincrease the spectral efficiency by transmitting or receiving multiplesignals via different spatial layers, which may be referred to asspatial multiplexing. The multiple signals may, for example, betransmitted by the transmitting device via different antennas ordifferent combinations of antennas. Likewise, the multiple signals maybe received by the receiving device via different antennas or differentcombinations of antennas. Each of the multiple signals may be referredto as a separate spatial stream, and may carry bits associated with thesame data stream (e.g., the same codeword) or different data streams.Different spatial layers may be associated with different antenna portsused for channel measurement and reporting. MIMO techniques includesingle-user MIMO (SU-MIMO) where multiple spatial layers are transmittedto the same receiving device, and multiple-user MIMO (MU-MIMO) wheremultiple spatial layers are transmitted to multiple devices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105 or a UE 115) to shape orsteer an antenna beam (e.g., a transmit beam or receive beam) along aspatial path between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that signals propagating atparticular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying certain amplitude and phase offsets to signals carried via eachof the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

In one example, a base station 105 may use multiple antennas or antennaarrays to conduct beamforming operations for directional communicationswith a UE 115. For instance, some signals (e.g. synchronization signals,reference signals, beam selection signals, or other control signals) maybe transmitted by a base station 105 multiple times in differentdirections, which may include a signal being transmitted according todifferent beamforming weight sets associated with different directionsof transmission. Transmissions in different beam directions may be usedto identify (e.g., by the base station 105 or a receiving device, suchas a UE 115) a beam direction for subsequent transmission and/orreception by the base station 105.

Some signals, such as data signals associated with a particularreceiving device, may be transmitted by a base station 105 in a singlebeam direction (e.g., a direction associated with the receiving device,such as a UE 115). In some examples, the beam direction associated withtransmissions along a single beam direction may be determined based atleast in in part on a signal that was transmitted in different beamdirections. For example, a UE 115 may receive one or more of the signalstransmitted by the base station 105 in different directions, and the UE115 may report to the base station 105 an indication of the signal itreceived with a highest signal quality, or an otherwise acceptablesignal quality. Although these techniques are described with referenceto signals transmitted in one or more directions by a base station 105,a UE 115 may employ similar techniques for transmitting signals multipletimes in different directions (e.g., for identifying a beam directionfor subsequent transmission or reception by the UE 115), or transmittinga signal in a single direction (e.g., for transmitting data to areceiving device).

A receiving device (e.g., a UE 115, which may be an example of a mmWreceiving device) may try multiple receive beams when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets applied to signals receivedat a plurality of antenna elements of an antenna array, or by processingreceived signals according to different receive beamforming weight setsapplied to signals received at a plurality of antenna elements of anantenna array, any of which may be referred to as “listening” accordingto different receive beams or receive directions. In some examples areceiving device may use a single receive beam to receive along a singlebeam direction (e.g., when receiving a data signal). The single receivebeam may be aligned in a beam direction determined based at least inpart on listening according to different receive beam directions (e.g.,a beam direction determined to have a highest signal strength, highestsignal-to-noise ratio, or otherwise acceptable signal quality based atleast in part on listening according to multiple beam directions).

In some cases, the antennas of a base station 105 or UE 115 may belocated within one or more antenna arrays, which may support MIMOoperations, or transmit or receive beamforming. For example, one or morebase station antennas or antenna arrays may be co-located at an antennaassembly, such as an antenna tower. In some cases, antennas or antennaarrays associated with a base station 105 may be located in diversegeographic locations. A base station 105 may have an antenna array witha number of rows and columns of antenna ports that the base station 105may use to support beamforming of communications with a UE 115.Likewise, a UE 115 may have one or more antenna arrays that may supportvarious MIMO or beamforming operations.

In some cases, wireless communications system 100 may be a packet-basednetwork that operate according to a layered protocol stack. In the userplane, communications at the bearer or Packet Data Convergence Protocol(PDCP) layer may be IP-based. A Radio Link Control (RLC) layer mayperform packet segmentation and reassembly to communicate over logicalchannels. A Medium Access Control (MAC) layer may perform priorityhandling and multiplexing of logical channels into transport channels.The MAC layer may also use hybrid automatic repeat request (HARM) toprovide retransmission at the MAC layer to improve link efficiency. Inthe control plane, the Radio Resource Control (RRC) protocol layer mayprovide establishment, configuration, and maintenance of an RRCconnection between a UE 115 and a base station 105 or core network 130supporting radio bearers for user plane data. At the Physical layer,transport channels may be mapped to physical channels.

In some cases, UEs 115 and base stations 105 may support retransmissionsof data to increase the likelihood that data is received successfully.HARQ feedback is one technique of increasing the likelihood that data isreceived correctly over a communication link 125. HARQ may include acombination of error detection (e.g., using a cyclic redundancy check(CRC)), forward error correction (FEC), and retransmission (e.g.,automatic repeat request (ARQ)). HARQ may improve throughput at the MAClayer in poor radio conditions (e.g., signal-to-noise conditions). Insome cases, a wireless device may support same-slot HARQ feedback, wherethe device may provide HARQ feedback in a specific slot for datareceived in a previous symbol in the slot. In other cases, the devicemay provide HARQ feedback in a subsequent slot, or according to someother time interval.

Time intervals in LTE or NR may be expressed in multiples of a basictime unit, which may, for example, refer to a sampling period of T_(s)=1/30,720,000 seconds. Time intervals of a communications resource may beorganized according to radio frames each having a duration of 10milliseconds (ms), where the frame period may be expressed asT_(f)=307,200 T_(s). The radio frames may be identified by a systemframe number (SFN) ranging from 0 to 1023. Each frame may include 10subframes numbered from 0 to 9, and each subframe may have a duration of1 ms. A subframe may be further divided into 2 slots each having aduration of 0.5 ms, and each slot may contain 6 or 7 modulation symbolperiods (e.g., depending on the length of the cyclic prefix prepended toeach symbol period). Excluding the cyclic prefix, each symbol period maycontain 2048 sampling periods. In some cases, a subframe may be thesmallest scheduling unit of the wireless communications system 100, andmay be referred to as a transmission time interval (TTI). In othercases, a smallest scheduling unit of the wireless communications system100 may be shorter than a subframe or may be dynamically selected (e.g.,in bursts of shortened TTIs (sTTIs) or in selected component carriersusing sTTIs).

In some wireless communications systems, a slot may further be dividedinto multiple mini-slots containing one or more symbols. In someinstances, a symbol of a mini-slot or a mini-slot may be the smallestunit of scheduling. Each symbol may vary in duration depending on thesubcarrier spacing or frequency band of operation, for example. Further,some wireless communications systems may implement slot aggregation inwhich multiple slots or mini-slots are aggregated together and used forcommunication between a UE 115 and a base station 105.

The term “carrier” refers to a set of radio frequency spectrum resourceshaving a defined physical layer structure for supporting communicationsover a communication link 125. For example, a carrier of a communicationlink 125 may include a portion of a radio frequency spectrum band thatis operated according to physical layer channels for a given radioaccess technology. Each physical layer channel may carry user data,control information, or other signaling. A carrier may be associatedwith a pre-defined frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)), and may be positionedaccording to a channel raster for discovery by UEs 115. Carriers may bedownlink or uplink (e.g., in an FDD mode), or be configured to carrydownlink and uplink communications (e.g., in a TDD mode). In someexamples, signal waveforms transmitted over a carrier may be made up ofmultiple sub-carriers (e.g., using multi-carrier modulation (MCM)techniques such as orthogonal frequency division multiplexing (OFDM) ordiscrete Fourier transform spread OFDM (DFT-S-OFDM)).

The organizational structure of the carriers may be different fordifferent radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR).For example, communications over a carrier may be organized according toTTIs or slots, each of which may include user data as well as controlinformation or signaling to support decoding the user data. A carriermay also include dedicated acquisition signaling (e.g., synchronizationsignals or system information, etc.) and control signaling thatcoordinates operation for the carrier. In some examples (e.g., in acarrier aggregation configuration), a carrier may also have acquisitionsignaling or control signaling that coordinates operations for othercarriers.

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using time divisionmultiplexing (TDM) techniques, frequency division multiplexing (FDM)techniques, or hybrid TDM-FDM techniques. In some examples, controlinformation transmitted in a physical control channel may be distributedbetween different control regions in a cascaded manner (e.g., between acommon control region or common search space and one or more UE-specificcontrol regions or UE-specific search spaces).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of predetermined bandwidths for carriers of a particularradio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). Insome examples, each served UE 115 may be configured for operating overportions or all of the carrier bandwidth. In other examples, some UEs115 may be configured for operation using a narrowband protocol typethat is associated with a predefined portion or range (e.g., set ofsubcarriers or RBs) within a carrier (e.g., “in-band” deployment of anarrowband protocol type).

In a system employing MCM techniques, a resource element may consist ofone symbol period (e.g., a duration of one modulation symbol) and onesubcarrier, where the symbol period and subcarrier spacing are inverselyrelated. The number of bits carried by each resource element may dependon the modulation scheme (e.g., the order of the modulation scheme).Thus, the more resource elements that a UE 115 receives and the higherthe order of the modulation scheme, the higher the data rate may be forthe UE 115. In MIMO systems, a wireless communications resource mayrefer to a combination of a radio frequency spectrum resource, a timeresource, and a spatial resource (e.g., spatial layers), and the use ofmultiple spatial layers may further increase the data rate forcommunications with a UE 115.

Devices of the wireless communications system 100 (e.g., base stations105 or UEs 115) may have a hardware configuration that supportscommunications over a particular carrier bandwidth, or may beconfigurable to support communications over one of a set of carrierbandwidths. In some examples, the wireless communications system 100 mayinclude base stations 105 and/or UEs 115 that support simultaneouscommunications via carriers associated with more than one differentcarrier bandwidth.

Wireless communications system 100 may support communication with a UE115 on multiple cells or carriers, a feature which may be referred to ascarrier aggregation or multi-carrier operation. A UE 115 may beconfigured with multiple downlink component carriers and one or moreuplink component carriers according to a carrier aggregationconfiguration. Carrier aggregation may be used with both FDD and TDDcomponent carriers.

In some cases, wireless communications system 100 may utilize enhancedcomponent carriers (eCCs). An eCC may be characterized by one or morefeatures including wider carrier or frequency channel bandwidth, shortersymbol duration, shorter TTI duration, or modified control channelconfiguration. In some cases, an eCC may be associated with a carrieraggregation configuration or a dual connectivity configuration (e.g.,when multiple serving cells have a suboptimal or non-ideal backhaullink). An eCC may also be configured for use in unlicensed spectrum orshared spectrum (e.g., where more than one operator is allowed to usethe spectrum). An eCC characterized by wide carrier bandwidth mayinclude one or more segments that may be utilized by UEs 115 that arenot capable of monitoring the whole carrier bandwidth or are otherwiseconfigured to use a limited carrier bandwidth (e.g., to conserve power).

In some cases, an eCC may utilize a different symbol duration than othercomponent carriers, which may include use of a reduced symbol durationas compared with symbol durations of the other component carriers. Ashorter symbol duration may be associated with increased spacing betweenadjacent subcarriers. A device, such as a UE 115 or base station 105,utilizing eCCs may transmit wideband signals (e.g., according tofrequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc.) atreduced symbol durations (e.g., 16.67 microseconds). A TTI in eCC mayconsist of one or multiple symbol periods. In some cases, the TTIduration (that is, the number of symbol periods in a TTI) may bevariable.

Wireless communications system 100 may be an NR system that may utilizeany combination of licensed, shared, and unlicensed spectrum bands,among others. The flexibility of eCC symbol duration and subcarrierspacing may allow for the use of eCC across multiple spectrums. In someexamples, NR shared spectrum may increase spectrum utilization andspectral efficiency, specifically through dynamic vertical (e.g., acrossthe frequency domain) and horizontal (e.g., across the time domain)sharing of resources.

A UE 115 may be scheduled for at least two colliding low prioritychannels and at least one colliding high priority channel. The UE 115may support multiplexing the at least two low priority channels, but theUE 115 may also support dropping any low priority channel which at leastpartially overlaps with a high priority channel. Therefore, the UE 115may either multiplex the colliding low priority uplink channels thendrop the final, multiplexed low priority transmission, or the UE 115 maydrop the low priority uplink channels that collide with the highpriority uplink channel then multiplex any remaining, colliding lowpriority uplink channels. Techniques described herein may enable a UE115 to determine an order for dropping and multiplexing colliding lowlatency channels when at least one of the colliding low latency channelsalso collides with a high priority uplink channel.

In some cases, the UE 115 may determine whether to first drop ormultiplex the low priority uplink channels based on when the UE 115receives a grant for the high priority uplink channel. The UE 115 maydetermine whether to multiplex or drop first based on if the highpriority grant is received before or after a multiplexing timelinedeadline. For example, if the high priority grant is received after thedeadline, the UE 115 may multiplex the low priority uplink channelsfirst, then drop the multiplexed low priority channel if it collideswith the high priority uplink channel. If the UE 115 receives the highpriority grant at a time before the multiplexing timeline deadline, thenthe UE 115 may drop some the low priority uplink channel(s) that collidewith the high priority uplink channel prior to multiplexing. Otherschemes for determining whether to multiplex first or drop first aredescribed herein.

FIG. 2 illustrates an example of a wireless communications system 200 inaccordance with aspects of the present disclosure. In some examples,wireless communications system 200 may implement aspects of wirelesscommunication system 100. The wireless communications system 200 mayinclude UE 115-a, which may be an example of a UE 115 described herein.The wireless communications system 200 may also include base station105-a and base station 105-b, which may each be an example of a basestation 105 described herein.

Communications between a UE 115 and a serving cell (e.g., provided by abase station 105) may have an associated priority level. For example, UE115-a may communicate on a wireless channel with a serving cell usinglow priority signaling 205 or using high priority signaling 210. UE115-a may receive low priority downlink transmissions on a low prioritydownlink channel 215 and transmit low priority uplink transmissions onat least one low priority uplink channel 220. Similarly, UE 115-a mayreceive high priority downlink transmissions on a high priority downlinkchannel 225 and transmit high priority uplink transmissions on a highpriority uplink channel 230. Although not shown, in some cases a singlebase station 105 may provide multiple cells, where the different cellsmay support communications with different priorities. For example, UE115-a may support both low priority signaling 205 and high prioritysignaling 210 with different cells supported by a single base station105.

The priority of a wireless channel established between UE 115-a and abase station 105 may be based on a variety of factors. For example,priority may be based on one or more of a type of communication used onthe channel, a format of downlink control information (DCI) schedulingthe channel, a bit field in the DCI, a Radio Network TemporaryIdentifier (RNTI), a control resource set index, a scheduling time oftransmission (e.g., a later-granted channel may have higher priority),and a transmission configuration indicator (TCI) state of the channel.UE 115-a may support different types of communications, such as eMBB andURLLC. In an example, eMBB communications may be an example of lowerpriority signaling 205 on lower priority channels, and URLLCcommunications may be an example of higher priority signaling 210 onhigher priority channels.

In some cases, UE 115-a may be scheduled for simultaneous transmissionon two or more channels. However, UE 115-a may not be capable ofsimultaneous transmission on certain combinations of channels. Forexample, UE 115-a may not support simultaneous transmission on twouplink control channels (e.g., physical uplink control channels(PUCCHs)) or simultaneous transmission on one uplink control channel(e.g., PUCCH) and one uplink shared channel (e.g., a physical uplinkshared channel (PUSCH)). If UE 115-a is scheduled for simultaneoustransmission of one of these channel combinations, the uplinktransmissions of UE 115-a may collide and not be decodable at thereceiving device (e.g., base station 105-a, base station 105-b, orboth).

If UE 115-a is scheduled to transmit on two or more uplink channels suchthat there would be a collision, UE 115-a may implement techniques toprevent the collision instead. The techniques may be based on a priorityof the colliding channels. For example, if the colliding channels are ofa same priority, UE 115-a may multiplex the colliding channels. Lowpriority uplink channel 220-a and low priority uplink channel 220-b maybe scheduled to overlap (e.g., collide) and may be of the same priority.Therefore, UE 115-a may be able to multiplex the low priority uplinkchannels 220 together and transmit a single transmission on one lowpriority uplink channel 220. In some cases, UE 115-a may multiplexcolliding transmissions of the same priority if a transmission timelinebased on both channels (e.g., a joint timeline) is satisfied. The jointtimeline is described in more detail with reference to FIG. 3 .

If the colliding channels have different priorities, UE 115-a may, insome cases, drop the lower priority channel, including its content, andtransmit the higher priority channel instead. Or, in some cases, UE115-a may multiplex some of the low priority channel's contents, such asHARQ-ACK feedback, with the higher priority channel. UE 115-a may thendrop the lower priority channel. In some cases, multiplexing lowpriority channels with high priority channels may increase complexity atthe UE 115. For example, the UE 115 would determine which channelsshould be multiplexed, how the contents would be compressed to reducethe impact on the high priority channel, how the contents would beencoded, whether the timeline for multiplexing is satisfied or not, etc.Therefore, to reduce complexity, UE 115 may, in some cases, drop any lowpriority channel which collides with a high priority channel.

In some cases, UE 115-a may be scheduled for at least two colliding lowpriority channels and at least one colliding high priority channel. Forexample, UE 115-a may be scheduled for low priority uplink channels220-a and 220-b and high priority uplink channel 230. Each of theseuplink channels may overlap with at least one of the other channels intime and collide. UE 115-a may support multiplexing the at least two lowpriority channels, but UE 115-a may also support dropping any lowpriority channel which overlaps with a high priority channel. Therefore,UE 115-a may either multiplex the colliding low priority uplink channels220 then drop the final, multiplexed low priority transmission (e.g.,should it collide with the high priority uplink channel 230), or UE115-a may drop at least one of the low priority uplink channels 220(e.g., that collide with the high priority uplink channel 230) thenmultiplex any remaining low priority uplink channels 220. Techniquesdescribed herein may enable a UE 115, such as UE 115-a, to determinewhether to first multiplex colliding low priority uplink channels 220then drop (e.g., as suitable based on any collisions) second, or tofirst drop any low priority uplink channels 220 that collide with thehigh priority uplink channel 230 then second multiplex any remainingcolliding low priority channels 220 (e.g., that don't collide with thehigh priority uplink channel 230).

UE 115-a may determine whether to drop or multiplex the low priorityuplink channels 220 first based on when UE 115-a receives a grant forthe high priority uplink channel 230. UE 115-a may determine whether tomultiplex or drop first based on if the high priority grant is receivedbefore or after a multiplexing timeline deadline. In some examples, themultiplexing timeline deadline may be based on processing timelines ofthe channels (e.g., N1, N2, or both), subcarrier spacing (SCS)configurations for the channels, and a timing capability of the UE. Someexamples of the processing timelines of the channels and themultiplexing timeline deadline are shown in more detail with referenceto FIG. 3 .

If the high priority grant is received after the deadline, UE 115-a maymultiplex the low priority uplink channels 220. UE 115-a may thenevaluate timings of the high priority uplink channel 230 and the final(e.g., multiplexed) low priority channel and drop the multiplexed lowpriority channel if it collides with the high priority uplink channel230. In some cases, if UE 115-a receives the high priority grant afterthe deadline, UE 115-a may have already begun to multiplex the lowpriority uplink channels 220.

If UE 115-a receives the high priority grant at a time before themultiplexing timeline deadline, then UE 115-a may drop some low priorityuplink channels 220 before multiplexing. For example, UE 115-a may dropthe low priority uplink channel(s) 220 that collide with the highpriority uplink channel 120. UE 115-a may then multiplex the remainingnon-colliding low priority channels. In this example, UE 115-a might nothave multiplexed the low priority uplink channels 220 yet, or UE 115-amay have enough time to determine which of the low priority uplinkchannels 220 collide with the high priority uplink channel 230 and dropthem. In this example, the order of multiplexing and dropping may bereversed based on if the high priority grant is received before or afterthe deadline (e.g., when the high priority channel is granted).

In some cases, the techniques described herein may lead to someadvantages for a UE 115 and base station 105. For example, bydetermining to drop the low priority uplink channels beforemultiplexing, uplink throughput for the UE 115 may be increased. Thesetechniques may support the UE 115 to meet stringent reliability andlatency conditions for some types of communications (e.g., URLLC) whilestill providing high throughput for other types of communications.Moreover, internal components of the UE 115 and base station 105applying the techniques may improve power utilization by dropping lowerpriority channels prior to multiplexing, thus saving processing power byskipping multiplexing of one or more lower priority channels.

UE 115-a may apply different schemes for determining whether tomultiplex first or drop first. In a first example, as described above,based on receiving a high priority grant before a latest timelinedeadline passes, UE 115-a may determine to drop one or more collidinglow priority channels before multiplexing the low priority channels. Ina second example, UE 115-a may determine the order of dropping andmultiplexing based on whether an end (e.g., a last symbol period) of ahigh priority downlink shared channel transmission (e.g., a highpriority physical downlink shared channel (PDSCH)) is before or afterthe timeline deadline. Additionally, or alternatively, UE 115-a may makethe determination using different criteria based on whether the highpriority grant is for a high priority uplink shared channel or a highpriority downlink shared channel.

In some examples, UE 115-a may have different timing advances fordifferent component carriers or different cells. For example, wirelesschannels provided by base station 105-a may have a first timing advance,and wireless channels provided by base station 105-b may have a secondtiming advance. UE 115-a may consider the different timing advances ofthe different component carriers when communicating on those componentcarriers. This may, in some cases, lead to inaccuracies when determiningwhether one or more channels collide. Therefore, when determining ifthere is an overlap or a collision between one or more channels toimplement the techniques described herein, UE 115-a may instead assumeeach of the potentially colliding channels have no timing advance (e.g.,a timing advance of 0). In some cases, UE 115-a may assume that thechannels are symbol aligned. UE 115-a may then determine whether tomultiplex or drop based on assuming the channels each have a timingadvance of 0. This may remove potential inaccuracies introduced by thedifferent timing advances.

One or more of the base stations 105 may also determine whether UE 115-adrops first or multiplexes first. In some cases, by determining whichchannel UE 115-a is dropping, the receiving base station 105 mayaccordingly expect to receive or not receive transmissions on thatchannel based on the dropping. Although generally described in thecontext of uplink transmissions, these techniques may also be appliedfor collisions of downlink transmissions.

FIG. 3 illustrates an example of a collision resolution scheme 300 inaccordance with aspects of the present disclosure. In some examples,collision resolution scheme 300 may implement aspects of wirelesscommunication system 100.

As described herein, a UE 115 may be scheduled for colliding uplinkchannels of different priorities. For example, the UE 115 may bescheduled to transmit low priority signaling 305 one or more uplinkchannels simultaneously. The UE 115 may also be scheduled to transmithigh priority signaling 310 on a high priority uplink channel which atleast partially overlaps with one of the low priority uplink channels.The UE 115 may multiplex the colliding low priority uplink channels ifthe low priority channels satisfy a joint timeline. However, the UE 115may also be configured drop any low priority channel that collides witha high priority channel. The UE 115 may therefore implement techniquesto determine an order for dropping low priority channels andmultiplexing them.

In an example, a low priority PUCCH 315 may overlap with a low priorityPUSCH 330. In some cases, the low priority PUCCH 315 may be transmittedin response to a low priority PDSCH 320. For example, the low priorityPUCCH 315 may carry feedback (e.g., ACK/NACK feedback) for the lowpriority PDSCH 320. The low priority PUSCH 330 may be scheduled by a lowpriority DCI 335. The low priority DCI 335 may include a grantindicating resources of the low priority PUSCH 330. In some cases, theUE 115 may not support simultaneous transmission on a PUCCH and a PUSCH.However, the UE 115 may be able to multiplex the low priority PUCCH 315and the low priority PUSCH 330 if they support the joint timeline.

For the UE 115 to multiplex the low priority PUCCH 315 and the lowpriority PUSCH 330, the first symbol of the earliest uplink channel(e.g., to be multiplexed) among all of the overlapping channels maystart no earlier than symbol N1+X after the last symbol of PDSCH. Afirst timing gap 325 shown here may be an example of a difference ofN1+X symbols between a first symbol of the low priority PUCCH 315 (e.g.,the earliest of the overlapping channels) and a last symbol of the lowpriority PDSCH 320. The joint timeline may also include that the firstsymbol of the earliest PUCCH or PUSCH among all the overlapping channelsstarts no earlier than a second timing gap 340 (e.g., of N2+Y symbols)after the last symbol of physical downlink control channels (PDCCHs)scheduling uplink transmissions (e.g., including HARQ-ACK feedback andPUSCH) for a slot. As shown, both the first timing gap 325 and thesecond timing gap 340 may be based on a starting point 345 relative tothe first symbol of the earliest uplink channel. The starting point 345of the first overlapping, low priority channel may be a reference pointfor the first timing gap 325 and the second timing gap 340. In somecases, the starting point 345 may also be a reference point formultiplexing timing deadlines.

If colliding channels have different priorities, the UE 115 may, in somecases, drop the lower priority channel and transmit the higher prioritychannel instead. As shown, the low priority PUCCH 315 may overlap withthe high priority PUCCH 370. The UE 115 may thus either multiplex theoverlapping low priority channels (e.g., the low priority PUCCH 315 andthe low priority PUSCH 330) first then determine whether to drop lowpriority channels that overlap with the high priority PUCCH 370, or theUE 115 may drop low priority channels that overlap with the highpriority PUCCH 370 and then multiplex any remaining overlapping lowpriority channels. As described herein, the UE 115 may implementtechniques to determine an order for multiplexing or dropping lowpriority channels.

The UE 115 may determine an order for dropping or multiplexing the lowpriority uplink channels based on when the UE 115 receives a grant forthe high priority PUCCH 370. The grant for the high priority PUCCH 370may be transmitted in a high priority PDCCH 360. The UE 115 maydetermine whether to multiplex or drop first based on if the highpriority grant is received before or after a multiplexing timelinedeadline (e.g., a latest deadline 350 or an earlier deadline 355). Insome examples, the multiplexing timeline deadline may be based onprocessing timelines of the channels (e.g., N1 or N2 corresponding tothe timing gaps 325 and 340), SCS configurations for the channels (e.g.,one or more of the high priority channel, one or more of the lowpriority channels, or any combination thereof), and a timing capabilityof the UE 115 (e.g., the duration of N1, N2, or both, may be a functionof UE capabilities).

In a first option, if the high priority grant (e.g., the end of the highpriority PDCCH 360 or the control resource set that carries the highpriority PDCCH 360) is received before the latest deadline 350 hasexpired, the UE 115 may check the overlapping channels and drop some ofthe low priority uplink channels before multiplexing. For example, thehigh priority PDCCH 360 is received before the latest deadline 350.Then, the UE 115 may drop the low priority PUCCH 315, as the lowpriority PUCCH 315 overlaps with the high priority PUCCH 370. The UE 115may not drop the low priority PUSCH 330 as it does not overlap with thehigh priority PUCCH 370. If the grant for the high priority PUCCH 370were received after the latest deadline 350, then the UE 115 maymultiplex the low priority PUCCH 315 with the low priority PUSCH 330.The UE 115 may then consider the high priority PUCCH 370 and the finallow priority channel (e.g., the multiplexed uplink channel of the lowpriority PUCCH 315 and the low priority PUSCH 330) and then drop thefinal low priority channel if it overlaps with the high priority PUCCH370. Thus, the UE 115 may drop first if the high priority grant isreceived before the latest deadline 350 and multiplex first if the highpriority grant is received after the latest deadline 350.

In a second example, the UE 115 may consider the end of a high priorityPDSCH 365 with respect to the multiplexing timeline deadlines. Forexample, if the last symbol of the high priority PDSCH 365 is receivedafter the latest deadline 350, the UE 115 may multiplex the low priorityPUCCH 315 and the low priority PUSCH 330. Then, the UE 115 may determinewhether to drop the final, multiplexed low priority channel based on ifit overlaps with the high priority PUCCH 370. Or, if the end of the highpriority PDSCH 365 is before the latest deadline 350, the UE 115 maydrop low priority channels which overlap with the high priority channelsfirst, then the UE 115 may multiplex any remaining colliding lowpriority uplink channels.

In some cases, the deadline used by the UE 115 to determine the order ofmultiplexing and dropping may be based on what type of channel the highpriority grant is for. For example, if the high priority grant is for ahigh priority PUSCH, then the multiplexing timeline deadline may be N2+Ysymbol periods from a reference point (e.g., the starting point 345).Or, if the high priority grant schedules a high priority PDSCH (e.g.,the high priority PDSCH 365), then the multiplexing timeline deadlinemay be N1+X symbol periods from the starting point 345. In otherexamples, other deadlines (e.g., including the earlier deadline 355) maybe used to determine the order of dropping and multiplexing.

In some examples, the UE 115 may drop the low priority channel based ona gap between the grant, or the PDCCH carrying the grant, and themultiplexing deadline (e.g., an end of the PDCCH and the latestmultiplexing deadline 350). For example, the UE 115 may drop beforemultiplexing if the grant is received at least a threshold number ofsymbol periods before the latest multiplexing deadline 350 (e.g., oranother multiplexing deadline in other examples). The threshold numberof symbol periods may be based on a type or direction of communicationassociated with the grant. For example, the threshold number of symbolperiods may be based on if the PDCCH is for granting PDSCH or PUSCH. Inan example, the threshold number of symbol periods may be based on N1,or be N1, if the grant carries a downlink assignment (e.g., PDSCH) or N2if the grant carries an uplink assignment (e.g., PUSCH).

FIG. 4 illustrates an example of a process flow 400 in accordance withaspects of the present disclosure. In some examples, process flow 400may implement aspects of wireless communication system 100. Process flow400 may include UE 115-b and base station 105-c, which may be respectiveexamples of a UE 115 and a base station 105 described herein.

At 405, base station 105-c may transmit a grant scheduling a firsthigher priority channel to UE 115-b that has a higher priority than eachchannel of multiple lower priority channels that may be scheduled for UE115-b.

In some cases, at 410, UE 115-b may determine a multiplexing deadline.In some examples, the multiplexing deadline may be relative to thebeginning of the first lower priority channel of multiple lower prioritychannels. Additionally, or alternatively, the multiplexing deadline maybe based on whether the grant schedules the first higher prioritychannel for uplink transmission or downlink transmission. In furtherexamples, the multiplexing deadline may be based on the processingtimelines of a number of lower priority channels, a set of subcarrierspacings of multiple lower priority channels, the timing capability ofUE 115-b, or a combination thereof.

In some examples, at 415, UE 115-b may multiplex content of a subset ofmultiple lower priority channels. In some examples, the lower prioritychannels may partially overlap in time with one another. In someexamples, the multiplexed content may be transmitted in a secondtransmission.

At 420, UE 115-b may drop the first lower priority channel of multiplelower priority channels that at least partially overlap in time with thefirst higher priority channel based on determining that the grant isreceived prior to the multiplexing deadline for multiple lower prioritychannels. In some examples, UE 115-b may drop a second lower prioritychannel of multiple lower priority channels. For example, the secondlower priority channel may partially overlap in time with the firsthigher priority channel.

In some examples, at 425, UE 115-b may multiplex content of a remainingsubset of multiple lower priority channels. In some examples, themultiplexing may be based on the dropping of multiple lower prioritychannels. For example, the multiple lower priority channels maypartially overlap in time with one another. In some examples, themultiplexed content may be transmitted in a second transmission.

At 430, UE 115-b may transmit or receive a first transmission to basestation 105-c using the first higher priority channel and, at 435,transmit or receive a second transmission using a second lower prioritychannel of the multiple lower priority channels based on the dropping.In some examples, the first transmission and the second transmission mayuse a single component carrier.

A UE and a base station may apply the techniques as described hereinwhich may result in some advantages, such as meeting latencyspecifications of channels having different priority levels. Moreover,internal components of the UE and base station applying the techniquesdescribed herein may improve power utilization by dropping lowerpriority channels prior to multiplexing, thus saving processing power byskipping multiplexing of one or more lower priority channels.

FIG. 5 shows a block diagram 500 of a device 505 in accordance withaspects of the present disclosure. The device 505 may be an example ofaspects of a UE 115 as described herein. The device 505 may include areceiver 510, a communications manager 515, and a transmitter 520. Thedevice 505 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 510 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timelineconsiderations for intra-UE multiplexing, etc.). Information may bepassed on to other components of the device 505. The receiver 510 may bean example of aspects of the transceiver 820 described with reference toFIG. 8 . The receiver 510 may utilize a single antenna or a set ofantennas.

The communications manager 515 may receive a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for the UE, drop a firstlower priority channel of the set of lower priority channels that atleast partially overlaps in time with the first higher priority channelbased on determining that the grant is received prior to a multiplexingdeadline for the set of lower priority channels, and transmit orreceiving a first transmission using the first higher priority channeland a second transmission using a second lower priority channel of theset of lower priority channels based on the dropping. The communicationsmanager 515 may be an example of aspects of the communications manager810 described herein.

The communications manager 515, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 515, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), a FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The communications manager 515, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 515, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 515, or its sub-components,may be combined with one or more other hardware components, includingbut not limited to an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 520 may transmit signals generated by other componentsof the device 505. In some examples, the transmitter 520 may becollocated with a receiver 510 in a transceiver module. For example, thetransmitter 520 may be an example of aspects of the transceiver 820described with reference to FIG. 8 . The transmitter 520 may utilize asingle antenna or a set of antennas.

FIG. 6 shows a block diagram 600 of a device 605 that supports timelineconsiderations for intra-UE multiplexing in accordance with aspects ofthe present disclosure. The device 605 may be an example of aspects of adevice 505, or a UE 115 as described herein. The device 605 may includea receiver 610, a communications manager 615, and a transmitter 635. Thedevice 605 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 610 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timelineconsiderations for intra-UE multiplexing, etc.). Information may bepassed on to other components of the device 605. The receiver 610 may bean example of aspects of the transceiver 820 described with reference toFIG. 8 . The receiver 610 may utilize a single antenna or a set ofantennas.

The communications manager 615 may be an example of aspects of thecommunications manager 515 as described herein. The communicationsmanager 615 may include a grant receiving component 620, a channeldropping component 625, and a priority-based communicating component630. The communications manager 615 may be an example of aspects of thecommunications manager 810 described herein.

The grant receiving component 620 may receive a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for the UE.

The channel dropping component 625 may drop a first lower prioritychannel of the set of lower priority channels that at least partiallyoverlaps in time with the first higher priority channel based ondetermining that the grant is received prior to a multiplexing deadlinefor the set of lower priority channels.

The priority-based communicating component 630 may transmit or receive afirst transmission using the first higher priority channel and a secondtransmission using a second lower priority channel of the set of lowerpriority channels based on the dropping.

The transmitter 635 may transmit signals generated by other componentsof the device 605. In some examples, the transmitter 635 may becollocated with a receiver 610 in a transceiver module. For example, thetransmitter 635 may be an example of aspects of the transceiver 820described with reference to FIG. 8 . The transmitter 635 may utilize asingle antenna or a set of antennas.

FIG. 7 shows a block diagram 700 of a communications manager 705 thatsupports timeline considerations for intra-UE multiplexing in accordancewith aspects of the present disclosure. The communications manager 705may be an example of aspects of a communications manager 515, acommunications manager 615, or a communications manager 810 describedherein. The communications manager 705 may include a grant receivingcomponent 710, a channel dropping component 715, a priority-basedcommunicating component 720, a deadline determining component 725, amultiplexing component 730, and a timing advance component 735. Each ofthese modules may communicate, directly or indirectly, with one another(e.g., via one or more buses).

The grant receiving component 710 may receive a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for the UE. In some examples,the grant receiving component 710 may determine a priority level of thefirst higher priority channel based on an indication included in thegrant.

In some examples, the grant receiving component 710 may receive a set ofgrants that respectively schedule the set of lower priority channels. Insome cases, the indication is one or more of a format of schedulingdownlink control information including the grant, a bit field, a radionetwork temporary identifier, a control resource set index, an order inwhich the first higher priority channel is scheduled relative to eachchannel of the set of lower priority channels, or a transmissionconfiguration indicator state corresponding to the grant. In some cases,the first higher priority channel is a first control channel and thefirst lower priority channel is a second control channel or a shareddata channel. In some cases, the first higher priority channel is acontrol channel or a shared data channel.

The channel dropping component 715 may drop a first lower prioritychannel of the set of lower priority channels that at least partiallyoverlaps in time with the first higher priority channel based ondetermining that the grant is received prior to a multiplexing deadlinefor the set of lower priority channels. In some examples, the channeldropping component 715 may drop a second lower priority channel of theset of lower priority channels that at least partially overlaps in timewith the first higher priority channel.

In some examples, the channel dropping component 715 may determine thata control channel carrying the grant ends prior to the multiplexingdeadline. In some examples, the channel dropping component 715 maydetermine that a shared data channel carrying the grant ends prior tothe multiplexing deadline. In some cases, each of the set of lowerpriority channels have a same priority level. In some cases, the firsthigher priority channel and the second lower priority channel do notoverlap in time.

In some examples, the channel dropping component 715 may drop the firstlower priority channel based on determining that the grant is receivedat least a threshold number of symbol periods prior to the multiplexingdeadline. In some cases, the threshold number of symbol periods may bebased on a transmission direction associated with the grant.

The priority-based communicating component 720 may transmit or receive afirst transmission using the first higher priority channel and a secondtransmission using a second lower priority channel of the set of lowerpriority channels based on the dropping.

In some examples, the priority-based communicating component 720 maytransmit or receive each of the first transmission and the secondtransmission using a single component carrier. In some cases, the firsthigher priority channel transports an ultra-reliable low latency serviceand the second lower priority channel transports an enhanced mobilebroadband service.

The deadline determining component 725 may determine the multiplexingdeadline relative to a beginning of the first lower priority channel ofthe set of lower priority channels. In some examples, the deadlinedetermining component 725 may determine the multiplexing deadline basedon whether the grant schedules the first higher priority channel foruplink transmission or downlink transmission. In some examples, thedeadline determining component 725 may determine the multiplexingdeadline based on one or more processing timelines of the set of lowerpriority channels, one or more subcarrier spacings of the set of lowerpriority channels, a timing capability of the UE, or any combinationthereof.

The multiplexing component 730 may multiplex, based on the dropping,content of a remaining subset of the set of lower priority channels thatat least partially overlap in time with one another, where the secondtransmission includes the multiplexed content. In some examples,transmitting or receiving a third transmission using a third lowerpriority channel of the set of lower priority channels that does notoverlap with any other lower priority channel of the set of lowerpriority channels, where the third transmission includes non-multiplexedcontent.

The timing advance component 735 may determine that the first lowerpriority channel at least partially overlaps in time with the firsthigher priority channel based on setting a timing advance to a commonvalue for a first component carrier configured for the first lowerpriority channel and a second component carrier configured for the firsthigher priority channel, the first component carrier differing from thesecond component carrier.

FIG. 8 shows a diagram of a system 800 including a device 805 thatsupports timeline considerations for intra-UE multiplexing in accordancewith aspects of the present disclosure. The device 805 may be an exampleof or include the components of device 505, device 605, or a UE 115 asdescribed herein. The device 805 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, including a communicationsmanager 810, an I/O controller 815, a transceiver 820, an antenna 825,memory 830, and a processor 840. These components may be in electroniccommunication via one or more buses (e.g., bus 845).

The communications manager 810 may receive a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for the UE, drop a firstlower priority channel of the set of lower priority channels that atleast partially overlaps in time with the first higher priority channelbased on determining that the grant is received prior to a multiplexingdeadline for the set of lower priority channels, and transmit orreceiving a first transmission using the first higher priority channeland a second transmission using a second lower priority channel of theset of lower priority channels based on the dropping.

The I/O controller 815 may manage input and output signals for thedevice 805. The I/O controller 815 may also manage peripherals notintegrated into the device 805. In some cases, the I/O controller 815may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 815 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. In other cases, the I/O controller 815may represent or interact with a modem, a keyboard, a mouse, atouchscreen, or a similar device. In some cases, the I/O controller 815may be implemented as part of a processor. In some cases, a user mayinteract with the device 805 via the I/O controller 815 or via hardwarecomponents controlled by the I/O controller 815.

The transceiver 820 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 820 may represent a wireless transceiver and may communicatebi-directionally with another wireless transceiver. The transceiver 820may also include a modem to modulate the packets and provide themodulated packets to the antennas for transmission, and to demodulatepackets received from the antennas.

In some cases, the wireless device may include a single antenna 825.However, in some cases the device may have more than one antenna 825,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 830 may include RAM and ROM. The memory 830 may storecomputer-readable, computer-executable code 835 including instructionsthat, when executed, cause the processor to perform various functionsdescribed herein. In some cases, the memory 830 may contain, among otherthings, a BIOS which may control basic hardware or software operationsuch as the interaction with peripheral components or devices.

The processor 840 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 840 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 840. The processor 840 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 830) to cause the device 805 to perform variousfunctions (e.g., functions or tasks supporting timeline considerationsfor intra-UE multiplexing).

The code 835 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 835 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 835 may not be directly executable by theprocessor 840 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 9 shows a block diagram 900 of a device 905 that supports timelineconsiderations for intra-UE multiplexing in accordance with aspects ofthe present disclosure. The device 905 may be an example of aspects of abase station 105 as described herein. The device 905 may include areceiver 910, a communications manager 915, and a transmitter 920. Thedevice 905 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 910 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timelineconsiderations for intra-UE multiplexing, etc.). Information may bepassed on to other components of the device 905. The receiver 910 may bean example of aspects of the transceiver 1220 described with referenceto FIG. 12 . The receiver 910 may utilize a single antenna or a set ofantennas.

The communications manager 915 may transmit a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for a UE, drop a first lowerpriority channel of the set of lower priority channels that at leastpartially overlaps in time with the first higher priority channel basedon the grant being transmitted prior to a multiplexing deadline for theset of lower priority channels, and transmit or receiving a firsttransmission using the first higher priority channel and a secondtransmission using a second lower priority channel of the set of lowerpriority channels based on the dropping. The communications manager 915may be an example of aspects of the communications manager 1210described herein.

The communications manager 915, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 915, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), a FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The communications manager 915, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 915, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 915, or its sub-components,may be combined with one or more other hardware components, includingbut not limited to an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 920 may transmit signals generated by other componentsof the device 905. In some examples, the transmitter 920 may becollocated with a receiver 910 in a transceiver module. For example, thetransmitter 920 may be an example of aspects of the transceiver 1220described with reference to FIG. 12 . The transmitter 920 may utilize asingle antenna or a set of antennas.

FIG. 10 shows a block diagram 1000 of a device 1005 that supportstimeline considerations for intra-UE multiplexing in accordance withaspects of the present disclosure. The device 1005 may be an example ofaspects of a device 905, or a base station 105 as described herein. Thedevice 1005 may include a receiver 1010, a communications manager 1015,and a transmitter 1035. The device 1005 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 1010 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timelineconsiderations for intra-UE multiplexing, etc.). Information may bepassed on to other components of the device 1005. The receiver 1010 maybe an example of aspects of the transceiver 1220 described withreference to FIG. 12 . The receiver 1010 may utilize a single antenna ora set of antennas.

The communications manager 1015 may be an example of aspects of thecommunications manager 915 as described herein. The communicationsmanager 1015 may include a grant transmitting component 1020, a channeldropping component 1025, and a priority-based communicating component1030. The communications manager 1015 may be an example of aspects ofthe communications manager 1210 described herein.

The grant transmitting component 1020 may transmit a grant scheduling afirst higher priority channel that has a higher priority than eachchannel of a set of lower priority channels scheduled for a UE.

The channel dropping component 1025 may drop a first lower prioritychannel of the set of lower priority channels that at least partiallyoverlaps in time with the first higher priority channel based on thegrant being transmitted prior to a multiplexing deadline for the set oflower priority channels.

The priority-based communicating component 1030 may transmit or receivea first transmission using the first higher priority channel and asecond transmission using a second lower priority channel of the set oflower priority channels based on the dropping.

The transmitter 1035 may transmit signals generated by other componentsof the device 1005. In some examples, the transmitter 1035 may becollocated with a receiver 1010 in a transceiver module. For example,the transmitter 1035 may be an example of aspects of the transceiver1220 described with reference to FIG. 12 . The transmitter 1035 mayutilize a single antenna or a set of antennas.

FIG. 11 shows a block diagram 1100 of a communications manager 1105 thatsupports timeline considerations for intra-UE multiplexing in accordancewith aspects of the present disclosure. The communications manager 1105may be an example of aspects of a communications manager 915, acommunications manager 1015, or a communications manager 1210 describedherein. The communications manager 1105 may include a grant transmittingcomponent 1110, a channel dropping component 1115, a priority-basedcommunicating component 1120, a deadline determining component 1125, amultiplexing component 1130, and a timing advance component 1135. Eachof these modules may communicate, directly or indirectly, with oneanother (e.g., via one or more buses).

The grant transmitting component 1110 may transmit a grant scheduling afirst higher priority channel that has a higher priority than eachchannel of a set of lower priority channels scheduled for a UE. In someexamples, the grant transmitting component 1110 may determine a prioritylevel of the first higher priority channel based on an indicationincluded in the grant. In some examples, the grant transmittingcomponent 1110 may transmit a set of grants that respectively schedulethe set of lower priority channels.

In some cases, the indication is one or more of a format of schedulingdownlink control information including the grant, a bit field, a radionetwork temporary identifier, a control resource set index, an order inwhich the first higher priority channel is scheduled relative to eachchannel of the set of lower priority channels, or a transmissionconfiguration indicator state corresponding to the grant. In some cases,the first higher priority channel is a first control channel and thefirst lower priority channel is a second control channel or a shareddata channel.

The channel dropping component 1115 may drop a first lower prioritychannel of the set of lower priority channels that at least partiallyoverlaps in time with the first higher priority channel based on thegrant being transmitted prior to a multiplexing deadline for the set oflower priority channels. In some examples, the channel droppingcomponent 1115 may drop a second lower priority channel of the set oflower priority channels that at least partially overlaps in time withthe first higher priority channel.

In some examples, the channel dropping component 1115 may determine thata control channel carrying the grant ends prior to the multiplexingdeadline. In some examples, the channel dropping component 1115 maydetermine that a shared data channel carrying the grant ends prior tothe multiplexing deadline. In some cases, each of the set of lowerpriority channels have a same priority level. In some cases, the firsthigher priority channel is a control channel or a shared data channel.In some cases, the first higher priority channel and the second lowerpriority channel do not overlap in time.

In some examples, the channel dropping component 1115 may drop the firstlower priority channel based on the grant being transmitted at least athreshold number of symbol periods prior to the multiplexing deadline.In some cases, the threshold number of symbol periods may be based on atransmission direction associated with the grant.

The priority-based communicating component 1120 may transmit or receivea first transmission using the first higher priority channel and asecond transmission using a second lower priority channel of the set oflower priority channels based on the dropping. In some examples, thepriority-based communicating component 1120 may transmit or receive eachof the first transmission and the second transmission using a singlecomponent carrier. In some cases, the first higher priority channeltransports an ultra-reliable low latency service and the second lowerpriority channel transports an enhanced mobile broadband service.

The deadline determining component 1125 may determine the multiplexingdeadline relative to a beginning of the first lower priority channel ofthe set of lower priority channels. In some examples, the deadlinedetermining component 1125 may determine the multiplexing deadline basedon whether the grant schedules the first higher priority channel foruplink transmission or downlink transmission. In some examples, thedeadline determining component 1125 may determine the multiplexingdeadline based on one or more processing timelines of the set of lowerpriority channels, one or more subcarrier spacings of the set of lowerpriority channels, a timing capability of the UE, or any combinationthereof.

The multiplexing component 1130 may multiplex, based on the dropping,content of a remaining subset of the set of lower priority channels thatat least partially overlap in time with one another, where the secondtransmission includes the multiplexed content. In some examples,transmitting or receiving a third transmission using a third lowerpriority channel of the set of lower priority channels that does notoverlap with any other lower priority channel of the set of lowerpriority channels, where the third transmission includes non-multiplexedcontent.

The timing advance component 1135 may determine that the first lowerpriority channel at least partially overlaps in time with the firsthigher priority channel based on setting a timing advance to a commonvalue for a first component carrier configured for the first lowerpriority channel and a second component carrier configured for the firsthigher priority channel, the first component carrier differing from thesecond component carrier.

FIG. 12 shows a diagram of a system 1200 including a device 1205 thatsupports timeline considerations for intra-UE multiplexing in accordancewith aspects of the present disclosure. The device 1205 may be anexample of or include the components of device 905, device 1005, or abase station 105 as described herein. The device 1205 may includecomponents for bi-directional voice and data communications includingcomponents for transmitting and receiving communications, including acommunications manager 1210, a network communications manager 1215, atransceiver 1220, an antenna 1225, memory 1230, a processor 1240, and aninter-station communications manager 1245. These components may be inelectronic communication via one or more buses (e.g., bus 1250).

The communications manager 1210 may transmit a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa set of lower priority channels scheduled for a UE, drop a first lowerpriority channel of the set of lower priority channels that at leastpartially overlaps in time with the first higher priority channel basedon the grant being transmitted prior to a multiplexing deadline for theset of lower priority channels, and transmit or receiving a firsttransmission using the first higher priority channel and a secondtransmission using a second lower priority channel of the set of lowerpriority channels based on the dropping.

The network communications manager 1215 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1215 may manage the transferof data communications for client devices, such as one or more UEs 115.

The transceiver 1220 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 1220 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1220 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1225.However, in some cases the device may have more than one antenna 1225,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1230 may include RAM, ROM, or a combination thereof. Thememory 1230 may store computer-readable code 1235 including instructionsthat, when executed by a processor (e.g., the processor 1240) cause thedevice to perform various functions described herein. In some cases, thememory 1230 may contain, among other things, a BIOS which may controlbasic hardware or software operation such as the interaction withperipheral components or devices.

The processor 1240 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1240 may be configured to operate a memoryarray using a memory controller. In some cases, a memory controller maybe integrated into processor 1240. The processor 1240 may be configuredto execute computer-readable instructions stored in a memory (e.g., thememory 1230) to cause the device 1205 to perform various functions(e.g., functions or tasks supporting timeline considerations forintra-UE multiplexing).

The inter-station communications manager 1245 may manage communicationswith other base station 105, and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1245 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1245 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The code 1235 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1235 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1235 may not be directly executable by theprocessor 1240 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 13 shows a flowchart illustrating a method 1300 that supportstimeline considerations for intra-UE multiplexing in accordance withaspects of the present disclosure. The operations of method 1300 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1300 may be performed by acommunications manager as described with reference to FIGS. 5 through 8. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedbelow. Additionally or alternatively, a UE may perform aspects of thefunctions described below using special-purpose hardware.

At 1305, the UE may receive a grant scheduling a first higher prioritychannel that has a higher priority than each channel of a set of lowerpriority channels scheduled for the UE. The operations of 1305 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1305 may be performed by a grant receivingcomponent as described with reference to FIGS. 5 through 8 .

At 1310, the UE may drop a first lower priority channel of the set oflower priority channels that at least partially overlaps in time withthe first higher priority channel based on determining that the grant isreceived prior to a multiplexing deadline for the set of lower prioritychannels. The operations of 1310 may be performed according to themethods described herein. In some examples, aspects of the operations of1310 may be performed by a channel dropping component as described withreference to FIGS. 5 through 8 .

At 1315, the UE may transmit or receive a first transmission using thefirst higher priority channel and a second transmission using a secondlower priority channel of the set of lower priority channels based onthe dropping. The operations of 1315 may be performed according to themethods described herein. In some examples, aspects of the operations of1315 may be performed by a priority-based communicating component asdescribed with reference to FIGS. 5 through 8 .

In some cases, the techniques described herein may lead to someadvantages for a UE 115 and base station 105. For example, bydetermining to drop the low priority uplink channels beforemultiplexing, uplink throughput for the UE 115 may be increased. Thesetechniques may support the UE 115 to meet stringent reliability andlatency conditions for some types of communications (e.g., URLLC) whilestill providing high throughput for other types of communications.Moreover, internal components of the UE 115 and base station 105applying the techniques may improve power utilization by dropping lowerpriority channels prior to multiplexing, thus saving processing power byskipping multiplexing of one or more lower priority channels.

FIG. 14 shows a flowchart illustrating a method 1400 that supportstimeline considerations for intra-UE multiplexing in accordance withaspects of the present disclosure. The operations of method 1400 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1400 may be performed by acommunications manager as described with reference to FIGS. 5 through 8. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedbelow. Additionally or alternatively, a UE may perform aspects of thefunctions described below using special-purpose hardware.

At 1405, the UE may receive a grant scheduling a first higher prioritychannel that has a higher priority than each channel of a set of lowerpriority channels scheduled for the UE. The operations of 1405 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1405 may be performed by a grant receivingcomponent as described with reference to FIGS. 5 through 8 .

At 1410, the UE may drop a first lower priority channel of the set oflower priority channels that at least partially overlaps in time withthe first higher priority channel based on determining that the grant isreceived prior to a multiplexing deadline for the set of lower prioritychannels. The operations of 1410 may be performed according to themethods described herein. In some examples, aspects of the operations of1410 may be performed by a channel dropping component as described withreference to FIGS. 5 through 8 .

At 1415, the UE may multiplex, based on the dropping, content of aremaining subset of the set of lower priority channels that at leastpartially overlap in time with one another, where the secondtransmission includes the multiplexed content. The operations of 1415may be performed according to the methods described herein. In someexamples, aspects of the operations of 1415 may be performed by amultiplexing component as described with reference to FIGS. 5 through 8.

At 1420, the UE may transmit or receive a first transmission using thefirst higher priority channel and a second transmission using a secondlower priority channel of the set of lower priority channels based onthe dropping. The operations of 1420 may be performed according to themethods described herein. In some examples, aspects of the operations of1420 may be performed by a priority-based communicating component asdescribed with reference to FIGS. 5 through 8 .

FIG. 15 shows a flowchart illustrating a method 1500 that supportstimeline considerations for intra-UE multiplexing in accordance withaspects of the present disclosure. The operations of method 1500 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1500 may be performed by acommunications manager as described with reference to FIGS. 5 through 8. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedbelow. Additionally or alternatively, a UE may perform aspects of thefunctions described below using special-purpose hardware.

At 1505, the UE may receive a grant scheduling a first higher prioritychannel that has a higher priority than each channel of a set of lowerpriority channels scheduled for the UE. The operations of 1505 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1505 may be performed by a grant receivingcomponent as described with reference to FIGS. 5 through 8 .

At 1510, the UE may drop a first lower priority channel of the set oflower priority channels that at least partially overlaps in time withthe first higher priority channel based on determining that the grant isreceived prior to a multiplexing deadline for the set of lower prioritychannels. The operations of 1510 may be performed according to themethods described herein. In some examples, aspects of the operations of1510 may be performed by a channel dropping component as described withreference to FIGS. 5 through 8 .

At 1515, the UE may drop a second lower priority channel of the set oflower priority channels that at least partially overlaps in time withthe first higher priority channel. The operations of 1515 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1515 may be performed by a channel droppingcomponent as described with reference to FIGS. 5 through 8 .

At 1520, the UE may transmit or receive a first transmission using thefirst higher priority channel and a second transmission using a secondlower priority channel of the set of lower priority channels based onthe dropping. The operations of 1520 may be performed according to themethods described herein. In some examples, aspects of the operations of1520 may be performed by a priority-based communicating component asdescribed with reference to FIGS. 5 through 8 .

FIG. 16 shows a flowchart illustrating a method 1600 that supportstimeline considerations for intra-UE multiplexing in accordance withaspects of the present disclosure. The operations of method 1600 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 1600 may be performed by acommunications manager as described with reference to FIGS. 9 through 12. In some examples, a base station may execute a set of instructions tocontrol the functional elements of the base station to perform thefunctions described below. Additionally or alternatively, a base stationmay perform aspects of the functions described below usingspecial-purpose hardware.

At 1605, the base station may transmit a grant scheduling a first higherpriority channel that has a higher priority than each channel of a setof lower priority channels scheduled for a UE. The operations of 1605may be performed according to the methods described herein. In someexamples, aspects of the operations of 1605 may be performed by a granttransmitting component as described with reference to FIGS. 9 through 12.

At 1610, the base station may drop a first lower priority channel of theset of lower priority channels that at least partially overlaps in timewith the first higher priority channel based on the grant beingtransmitted prior to a multiplexing deadline for the set of lowerpriority channels. The operations of 1610 may be performed according tothe methods described herein. In some examples, aspects of theoperations of 1610 may be performed by a channel dropping component asdescribed with reference to FIGS. 9 through 12 .

At 1615, the base station may transmit or receive a first transmissionusing the first higher priority channel and a second transmission usinga second lower priority channel of the set of lower priority channelsbased on the dropping. The operations of 1615 may be performed accordingto the methods described herein. In some examples, aspects of theoperations of 1615 may be performed by a priority-based communicatingcomponent as described with reference to FIGS. 9 through 12 .

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Techniques described herein may be used for various wirelesscommunications systems such as code division multiple access (CDMA),time division multiple access (TDMA), frequency division multiple access(FDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and other systems.A CDMA system may implement a radio technology such as CDMA2000,Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000,IS-95, and IS-856 standards. IS-2000 Releases may be commonly referredto as CDMA2000 1×, 1×, etc. IS-856 (TIA-856) is commonly referred to asCDMA2000 1×EV-DO, High Rate Packet Data (HRPD), etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. A TDMA system mayimplement a radio technology such as Global System for MobileCommunications (GSM).

An OFDMA system may implement a radio technology such as Ultra MobileBroadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical andElectronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal MobileTelecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are releasesof UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR,and GSM are described in documents from the organization named “3rdGeneration Partnership Project” (3GPP). CDMA2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). The techniques described herein may be used for thesystems and radio technologies mentioned herein as well as other systemsand radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NRsystem may be described for purposes of example, and LTE, LTE-A, LTE-APro, or NR terminology may be used in much of the description, thetechniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro,or NR applications.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by UEswith service subscriptions with the network provider. A small cell maybe associated with a lower-powered base station, as compared with amacro cell, and a small cell may operate in the same or different (e.g.,licensed, unlicensed, etc.) frequency bands as macro cells. Small cellsmay include pico cells, femto cells, and micro cells according tovarious examples. A pico cell, for example, may cover a small geographicarea and may allow unrestricted access by UEs with service subscriptionswith the network provider. A femto cell may also cover a smallgeographic area (e.g., a home) and may provide restricted access by UEshaving an association with the femto cell (e.g., UEs in a closedsubscriber group (CSG), UEs for users in the home, and the like). An eNBfor a macro cell may be referred to as a macro eNB. An eNB for a smallcell may be referred to as a small cell eNB, a pico eNB, a femto eNB, ora home eNB. An eNB may support one or multiple (e.g., two, three, four,and the like) cells, and may also support communications using one ormultiple component carriers.

The wireless communications systems described herein may supportsynchronous or asynchronous operation. For synchronous operation, thebase stations may have similar frame timing, and transmissions fromdifferent base stations may be approximately aligned in time. Forasynchronous operation, the base stations may have different frametiming, and transmissions from different base stations may not bealigned in time. The techniques described herein may be used for eithersynchronous or asynchronous operations.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection withthe disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, an FPGA, or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyconventional processor, controller, microcontroller, or state machine. Aprocessor may also be implemented as a combination of computing devices(e.g., a combination of a DSP and a microprocessor, multiplemicroprocessors, one or more microprocessors in conjunction with a DSPcore, or any other such configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein can be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude random-access memory (RAM), read-only memory (ROM), electricallyerasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROMor other optical disk storage, magnetic disk storage or other magneticstorage devices, or any other non-transitory medium that can be used tocarry or store desired program code means in the form of instructions ordata structures and that can be accessed by a general-purpose orspecial-purpose computer, or a general-purpose or special-purposeprocessor. Also, any connection is properly termed a computer-readablemedium. For example, if the software is transmitted from a website,server, or other remote source using a coaxial cable, fiber optic cable,twisted pair, digital subscriber line (DSL), or wireless technologiessuch as infrared, radio, and microwave, then the coaxial cable, fiberoptic cable, twisted pair, DSL, or wireless technologies such asinfrared, radio, and microwave are included in the definition of medium.Disk and disc, as used herein, include CD, laser disc, optical disc,digital versatile disc (DVD), floppy disk and Blu-ray disc where disksusually reproduce data magnetically, while discs reproduce dataoptically with lasers. Combinations of the above are also includedwithin the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an exemplary step that is described as “based on conditionA” may be based on both a condition A and a condition B withoutdeparting from the scope of the present disclosure. In other words, asused herein, the phrase “based on” shall be construed in the same manneras the phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “exemplary” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, well-known structures and devices are shownin block diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person skilled in the artto make or use the disclosure. Various modifications to the disclosurewill be readily apparent to those skilled in the art, and the genericprinciples defined herein may be applied to other variations withoutdeparting from the scope of the disclosure. Thus, the disclosure is notlimited to the examples and designs described herein, but is to beaccorded the broadest scope consistent with the principles and novelfeatures disclosed herein.

What is claimed is:
 1. An apparatus for wireless communications by auser equipment (UE), comprising: one or more processors, memory inelectronic communication with the one or more processors; andinstructions stored in the memory and executable by the one or moreprocessors to cause the apparatus to: receive a grant scheduling a firsthigher priority channel that has a higher priority than each channel ofa plurality of lower priority channels scheduled for the UE; drop afirst lower priority channel of the plurality of lower priority channelsthat at least partially overlaps in time with the first higher prioritychannel based at least in part on a timing of the grant, wherein theinstructions to drop the first lower priority channel are executable bythe one or more processors to cause the apparatus to: drop the firstlower priority channel based at least in part on one or more processingtimelines of the plurality of lower priority channels, one or moresubcarrier spacings of the plurality of lower priority channels, atiming capability of the UE, or any combination thereof; and transmit atransmission based at least in part on the instructions that cause theapparatus to drop the first lower priority channel.
 2. The apparatus ofclaim 1, wherein the first lower priority channel is dropped based atleast in part on the grant being received prior to a beginning of thefirst lower priority channel of the plurality of lower prioritychannels.
 3. The apparatus of claim 1, wherein the instructions to dropthe first lower priority channel are executable by the one or moreprocessors to cause the apparatus to: drop the first lower prioritychannel based at least in part on the grant scheduling the transmissionas an uplink transmission in the first higher priority channel.
 4. Theapparatus of claim 1, wherein the instructions to drop the first lowerpriority channel are executable by the one or more processors to causethe apparatus to: drop the first lower priority channel based at leastin part on the one or more processing timelines of the plurality oflower priority channels.
 5. The apparatus of claim 1, wherein theinstructions are further executable by the one or more processors tocause the apparatus to: multiplex, based at least in part on thedropping, content of a remaining subset of the plurality of lowerpriority channels that at least partially overlap in time with oneanother, wherein the transmission comprises the multiplexed content. 6.The apparatus of claim 5, wherein the instructions are furtherexecutable by the one or more processors to cause the apparatus to:transmit a second transmission using a second lower priority channel ofthe plurality of lower priority channels that does not overlap with anyother lower priority channel of the plurality of lower prioritychannels, wherein the second transmission comprises non-multiplexedcontent.
 7. The apparatus of claim 1, wherein the instructions to dropthe first lower priority channel are executable by the one or moreprocessors to cause the apparatus to: drop the first lower prioritychannel based at least in part on determining that the grant is receivedat least a threshold number of symbol periods prior to a beginning ofthe first lower priority channel.
 8. The apparatus of claim 7, whereinthe threshold number of symbol periods is based at least in part on atransmission direction associated with the grant.
 9. The apparatus ofclaim 1, wherein the instructions are further executable by the one ormore processors to cause the apparatus to: drop a second lower prioritychannel of the plurality of lower priority channels that at leastpartially overlaps in time with the first higher priority channel. 10.The apparatus of claim 1, wherein the first lower priority channel isdropped based at least in part on a control channel carrying the grantor a shared data channel carrying the grant ending prior to a beginningof the first lower priority channel.
 11. The apparatus of claim 1,wherein the instructions to transmit the first lower priority channelare executable by the one or more processors to cause the apparatus to:transmit each of the transmission and a second transmission using asingle component carrier.
 12. The apparatus of claim 1, wherein thefirst lower priority channel at least partially overlaps in time withthe first higher priority channel based at least in part on setting atiming advance to a common value for a first component carrierconfigured for the first lower priority channel and a second componentcarrier configured for the first higher priority channel, the firstcomponent carrier differing from the second component carrier.
 13. Theapparatus of claim 1, wherein a priority level of the first higherpriority channel based at least in part on an indication included in thegrant.
 14. The apparatus of claim 13, wherein the indication is one ormore of a format of scheduling downlink control information comprisingthe grant, a bit field, a radio network temporary identifier, a controlresource set index, an order in which the first higher priority channelis scheduled relative to each channel of the plurality of lower prioritychannels, or a transmission configuration indicator state correspondingto the grant.
 15. The apparatus of claim 1, wherein the instructions arefurther executable by the one or more processors to cause the apparatusto: receive a plurality of grants that respectively schedule theplurality of lower priority channels.
 16. The apparatus of claim 1,wherein the first higher priority channel is a first control channel andthe first lower priority channel is a second control channel or a shareddata channel.
 17. The apparatus of claim 1, wherein the first higherpriority channel is a control channel or a shared data channel.
 18. Theapparatus of claim 1, wherein the first higher priority channeltransports an ultra-reliable low latency service and the plurality oflower priority channels transport an enhanced mobile broadband service.19. The apparatus of claim 1, wherein the instructions to drop the firstlower priority channel are executable by the one or more processors tocause the apparatus to: drop the first lower priority channel based atleast in part on the one or more subcarrier spacings of the plurality oflower priority channels.
 20. The apparatus of claim 1, wherein theinstructions to drop the first lower priority channel are executable bythe one or more processors to cause the apparatus to: drop the firstlower priority channel based at least in part on the timing capabilityof the UE.
 21. An apparatus for wireless communications by a basestation, comprising: one or more processors, memory in electroniccommunication with the one or more processors; and instructions storedin the memory and executable by the one or more processors to cause theapparatus to: transmit a grant scheduling a first higher prioritychannel that has a higher priority than each channel of a plurality oflower priority channels scheduled for a user equipment (UE); drop afirst lower priority channel of the plurality of lower priority channelsthat at least partially overlaps in time with the first higher prioritychannel based at least in part on a timing of the grant, wherein theinstructions to drop the first lower priority channel are executable bythe one or more processors to cause the apparatus to: drop the firstlower priority channel based at least in part on one or more processingtimelines of the plurality of lower priority channels, one or moresubcarrier spacings of the plurality of lower priority channels, atiming capability of the UE, or any combination thereof; and receive atransmission based at least in part on the instructions that cause theapparatus to drop the first lower priority channel.
 22. The apparatus ofclaim 21, wherein the first lower priority channel is dropped based atleast in part on the grant being received prior to a beginning of thefirst lower priority channel of the plurality of lower prioritychannels.
 23. The apparatus of claim 21, wherein the instructions todrop the first lower priority channel are executable by the one or moreprocessors to cause the apparatus to: drop the first lower prioritychannel based at least in part on the grant scheduling the transmissionas an uplink transmission in the first higher priority channel.
 24. Theapparatus of claim 21, wherein the instructions to drop the first lowerpriority channel are executable by the one or more processors to causethe apparatus to: drop the first lower priority channel based at leastin part on one or more processing timelines of the plurality of lowerpriority channels, one or more subcarrier spacings of the plurality oflower priority channels, a timing capability of the UE, or anycombination thereof.
 25. The apparatus of claim 21, wherein theinstructions are further executable by the one or more processors tocause the apparatus to: multiplex, based at least in part on thedropping, content of a remaining subset of the plurality of lowerpriority channels that at least partially overlap in time with oneanother, wherein the transmission comprises the multiplexed content. 26.The apparatus of claim 25, wherein the instructions are furtherexecutable by the one or more processors to cause the apparatus to:receive a second transmission using a second lower priority channel ofthe plurality of lower priority channels that does not overlap with anyother lower priority channel of the plurality of lower prioritychannels, wherein the second transmission comprises non-multiplexedcontent.
 27. The apparatus of claim 21, wherein the instructions to dropthe first lower priority channel are executable by the one or moreprocessors to cause the apparatus to: drop the first lower prioritychannel based at least in part on the grant being transmitted at least athreshold number of symbol periods prior to a beginning of the firstlower priority channel.
 28. The apparatus of claim 21, wherein theinstructions are further executable by the one or more processors tocause the apparatus to: drop a second lower priority channel of theplurality of lower priority channels that at least partially overlaps intime with the first higher priority channel.
 29. The apparatus of claim21, wherein the first lower priority channel is dropped based at leastin part on a control channel carrying the grant or a shared data channelcarrying the grant ending prior to a beginning of the first lowerpriority channel.
 30. The apparatus of claim 21, wherein theinstructions to receive the first lower priority channel are executableby the one or more processors to cause the apparatus to: receive each ofthe transmission and a second transmission using a single componentcarrier.
 31. A method for wireless communications by a user equipment(UE), comprising: receiving a grant scheduling a first higher prioritychannel that has a higher priority than each channel of a plurality oflower priority channels scheduled for the UE; dropping a first lowerpriority channel of the plurality of lower priority channels that atleast partially overlaps in time with the first higher priority channelbased at least in part on a timing of the grant, wherein dropping thefirst lower priority channel includes dropping the first lower prioritychannel based at least in part on one or more processing timelines ofthe plurality of lower priority channels, one or more subcarrierspacings of the plurality of lower priority channels, a timingcapability of the UE, or any combination thereof; and transmitting afirst transmission based at least in part on the dropping.
 32. A methodfor wireless communications by a base station, comprising: transmittinga grant scheduling a first higher priority channel that has a higherpriority than each channel of a plurality of lower priority channelsscheduled for a user equipment (UE); dropping a first lower prioritychannel of the plurality of lower priority channels that at leastpartially overlaps in time with the first higher priority channel basedat least in part on a timing of the grant, wherein dropping the firstlower priority channel includes dropping the first lower prioritychannel based at least in part on one or more processing timelines ofthe plurality of lower priority channels, one or more subcarrierspacings of the plurality of lower priority channels, a timingcapability of the UE, or any combination thereof; and receiving a firsttransmission based at least in part on the dropping.